Her brother told police she was "possibly under the influence of narcotics" and had picked up a knife, according to the police. When police entered the home, the woman still had the knife and would not drop it, according to Pat Camden, a spokesman for the Fraternal Order of Police.

The woman then started approaching an officer with the knife and police shot her, Camden said.

In WGN-TV video from the scene, a woman identified by the station as a relative runs toward an area cordoned off with crime tape as police rush up. Someone restrains her as she screams, "Let me go! Let me go!"